#include <iostream>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string>


struct A{
    int a_;
    int b_;
    A(int a,int b)
    :a_(a)
    ,b_(b)
    {}
};
int main()
{
    A a(1,4);
}